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This heading covers aluminium powders as defined in Note 8 (b) to Section XV and aluminium flakes. In general these products correspond to those of copper and the Explanatory Note to heading 74.06 therefore applies, mutatis mutandis, to this heading. Aluminium powders and flakes are, however, also used in pyrotechnics, as heat generators (e.g., in the thermit process), to protect other metals from corrosion (e.g., calorising, metallic cementation), in rocket propellants and in the preparation of special cements.
The heading does not cover :(a) Powders or flakes, prepared as colours, paints or the like (e.g., made up with other colouring matter or put up as suspensions, dispersions or pastes with a binder or solvent) (Chapter 32). (b) Aluminium pellets (heading 76.01). (c) Spangles cut from aluminium foil (heading 83.08).
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